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* For devices with connectors, please refer to patchcord spec., the "fiber length" is with connectors. WAVEGUIDE TYPE OPTICAL ISOLATOR AND CIRCULATOR USING MAGNETOOPTIC GARNET THIN FILMS Yasumitsu MIYAZAKI Department of Information Engineering Toyohashi. of Waveguide-Type Mono-Sectional Optical Isolators Using Bi: YIG Thin-Films. Calculations are presented describing a novel optical isolator which works by complete TE0TM0 mode conversion in magnetic garnet films caused by. Film magnets of different thicknesses are sputtered onto the waveg- uides, and isolation ratios of 29 dB are obtained with negligible -Film Magnet -Compliant. * Above specifications are for device without connector. The miniaturization of optical isolators and circulators has been actively pursued over the last. The plane is parallel to the channel for transmitting the optical signal, and the metal thin film (30) having a magnetic field is disposed on the magneto-optic thin film (20). The IWDM is built based on isolator and thin film filter to fullfill hybrid isolator+WDM function in one single compact package, it includes two different confugration due to pump direction, "forward pump" and "backward pump". Thorlabs manufactures a wide selection of narrowband and broadband free-space optical isolators (Faraday isolators) that operate in spectral ranges from 365 nm to 4550 nm, including high-power options, as well as fiber isolators designed for wavelength ranges from 650 to 2010 nm for polarization-independent versions. The present invention provides an optical isolator comprising a planar lightwave circuit (10), a magneto-optic thin film. A thinfilm waveguide Faraday rotator which provides nonreciprocal polarization rotation of 45 for light of wavelength 1.45 m with an extinction ratio of.